A method and apparatus for cell barring in a wireless communication system are provided. The method includes determining whether system information block type 1 (SIB1) is acquired from a cell, considering the cell as barred, if the acquiring the SIB1 fails, determining whether the cell is a licensed cell or an unlicensed cell and excluding the cell and other cells on a same frequency with the cell as a candidate for cell selection or reselection for a pre-defined period, if the cell is a licensed cell and cell selection or reselection to intra-frequency cells is not allowed.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A method for cell barring performed by a User Equipment (UE) in a wireless communication system, the method comprising: determining whether system information block type 1 (SIB 1 ) is acquired from a cell; considering the cell as barred, if the acquiring of the SIB 1 fails; determining whether the cell is a licensed cell or an unlicensed cell; and excluding the cell and other cells on a same frequency as the cell as a candidate for cell selection or reselection for a pre-defined period, if the cell is a licensed cell and cell selection or reselection to intra-frequency cells is not allowed.
2. The method of claim 1 , further comprising: considering the other cells as candidates for cell selection or reselection for the pre-defined period, if the cell is a licensed cell and cell selection or reselection to intra-frequency cells is allowed.
3. The method of claim 1 , further comprising: excluding the cell as a candidate for cell selection or reselection for the pre-defined period, if the cell is an unlicensed cell.
4. The method of claim 3 , further comprising: excluding the other cells as candidates for cell selection or reselection for the pre-defined period, if cell selection or reselection to intra-frequency cells is not allowed and the cell belongs to a public land mobile network (PLMN) equivalent to a registered PLMN.
5. The method of claim 1 , wherein the determining of whether the SIB 1 is acquired comprises determining whether the SIB 1 is received while a timer for cell selection or reselection is running in an idle mode, an inactive mode or a connected mode.
6. The method of claim 1 , further comprising: acquiring a master information block (MIB) from the cell, wherein a parameter intraFreqReselection included in the MIB indicates whether cell selection or reselection to intra-frequency cells is allowed.
7. A method for cell barring performed by a User Equipment (UE) in a wireless communication system, the method comprising: determining whether a barred cell is a licensed cell or an unlicensed cell; determining whether the barred cell belongs to a public land mobile network (PLMN) equivalent to a registered PLMN; and excluding cells on a same frequency as the barred cell as candidates for cell selection or reselection for a pre-defined period, if cell selection or reselection to intra-frequency cells is not allowed, the barred cell is an unlicensed cell and the barred cell belongs to a PLMN equivalent to a registered PLMN.
8. The method of claim 7 , further comprising: excluding the barred cell as a candidate for cell selection or reselection for the pre-defined period, if cell selection or reselection to intra-frequency cells is not allowed, the barred cell is unlicensed cell and the barred cell does not belong to the PLMN equivalent to the registered PLMN.
9. The method of claim 7 , further comprising: excluding the cells on the same frequency as the cell as a candidate for cell selection or reselection for the pre-defined period, if cell selection or reselection to intra-frequency cells is not allowed and the barred cell is a licensed cell.
10. The method of claim 7 , further comprising: acquiring, master information block (MIB) from the barred cell, wherein parameter intraFreqReselection included in the MIB indicates whether cell selection or reselection to intra-frequency cells is allowed, and wherein parameter cellBarred included in the MIB indicates barring of the barred cell.
11. A User Equipment (UE) in a wireless communication system, the UE comprising: a transceiver; at least one memory storing instructions for cell barring; and at least one processor configured to execute the instructions to: determine whether system information block type 1 (SIB 1 ) is acquired from a cell; consider the cell as barred, if the acquiring of the SIB 1 fails; determine whether the cell is a licensed cell or an unlicensed cell; and exclude the cell and other cells on a same frequency as the cell as a candidate for cell selection or reselection for a pre-defined period, if the cell is a licensed cell and cell selection or reselection to intra-frequency cells is not allowed.
12. The UE of claim 11 , wherein the at least one processor further configured to: consider the other cells as candidates for cell selection or reselection for the pre-defined period, if the cell is a licensed cell and cell selection or reselection to intra-frequency cells is allowed.
13. The UE of claim 11 , wherein the at least one processor further configured to: exclude the cell as a candidate for cell selection or reselection for the pre-defined period, if the cell is an unlicensed cell.
14. The UE of claim 13 , wherein the at least one processor further configured to: exclude the other cells as candidates for cell selection or reselection for the pre-defined period, if cell selection or reselection to intra-frequency cells is not allowed and the cell belongs to a public land mobile network (PLMN) equivalent to a registered PLMN.
15. The UE of claim 11 , wherein the at least one processor configured to determine whether the SIB 1 is received while a timer for cell selection or reselection is running in an idle mode, an inactive mode or a connected mode.
16. The UE of claim 11 , wherein the at least one processor configured to: acquire a master information block (MIB) from the cell, and wherein a parameter intraFreqReselection included in the MIB indicates whether cell selection or reselection to intra-frequency cells is allowed.
17. A User Equipment (UE) in a wireless communication system, the UE comprising: a transceiver; at least one memory storing instructions for cell barring; and at least one processor configured to execute the instructions to: determine whether a barred cell is a licensed cell or an unlicensed cell; determine whether the barred cell belongs to a public land mobile network (PLMN) equivalent to a registered PLMN; and exclude cells on a same frequency as the barred cell as candidates for cell selection or reselection for a pre-defined period, if cell selection or reselection to intra-frequency cells is not allowed, the barred cell is an unlicensed cell and the barred cell belongs to a PLMN equivalent to a registered PLMN.
18. The UE of claim 17 , wherein the at least one processor further configured to: exclude the barred cell as a candidate for cell selection or reselection for the pre-defined period, if cell selection or reselection to intra-frequency cells is not allowed, the barred cell is unlicensed cell and the barred cell does not belong to the PLMN equivalent to the registered PLMN.
19. The UE of claim 17 , wherein the at least one processor further configured to: exclude the cells on the same frequency as the cell as a candidate for cell selection or reselection for the pre-defined period, if cell selection or reselection to intra-frequency cells is not allowed and the barred cell is a licensed cell.
20. The UE of claim 17 , wherein the at least one processor further configured to: acquire master information block (MIB) from the barred cell, wherein parameter intraFreqReselection included in the MIB indicates whether cell selection or reselection to intra-frequency cells is allowed, and wherein parameter cellBarred included in the MIB indicates barring of the barred cell.
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January 28, 2020
February 2, 2021
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